<template>
   <view class="login-container">
      <!-- 提示登录的图标 -->
      <uni-icons type="contact-filled" size="100" color="#AFAFAF"></uni-icons>
      <!-- 登录按钮 -->
      <button type="primary" class="btn-login" @click="getUserProfile">一键登录</button>
      <!-- 登录提示 -->
      <view class="tips-text">登录后尽享更多权益</view>
    </view>
</template>

<script>
  import {mapMutations,mapState} from 'vuex'
  export default {
    name:"my-login",
    data() {
      return {
      
      };
    },
    methods:{
      ...mapMutations('m_user',['updateUserInfo','updateToken','updateRedirectInfo']),
      getUserProfile(e){
        wx.getUserProfile({
          desc:'用于登录',
          success:(res)=>{
            // console.log(res)
            this.updateUserInfo(res.userInfo)
            // 获取登录成功后的 Token 字符串
            this.getToken(res)
           return
          },
          fail:(res)=>{
           return uni.$showMsg('您取消了登录授权！')
          },
        })
      },
     async getToken(info) {
       // 调用微信登录接口
       const [err, res] = await uni.login().catch(err => err)
      // console.log(res)
       // 判断是否 uni.login() 调用失败
       if (err || res.errMsg !== "login:ok") return uni.$showError('登录失败！')
        // console.log(info)
       // 准备参数对象
       const query = {
         code: res.code,
         encryptedData: info.encryptedData,
         iv: info.iv,
         rawData: info.rawData,
         signature: info.signature
       }
       // 换取 token
       const { data: loginResult } = await uni.$http.post('/api/public/v1/users/wxlogin', query)
       if (loginResult.meta.status !== 200) return uni.$showMsg('登录失败！')
       // uni.$showMsg('登录成功')
       this.updateToken(loginResult.message.token)
       this.navigateBack();
     },
     navigateBack(){
       if(this.redirectInfo && this.redirectInfo.opType==='switchTYab'){
         uni.switchTab({
           url:this.redirectInfo.from,
           complete:()=>{
             this.updateRedirectInfo(null)
           }
         })
       }
     }
  },
  computed:{
    ...mapState('m_user',['redirectInfo'])
  }
  }
</script>

<style lang="scss">
.login-container {
  // 登录盒子的样式
  height: 750rpx;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #f8f8f8;
  position: relative;
  overflow: hidden;

  // 绘制登录盒子底部的半椭圆造型
  &::after {
    content: ' ';
    display: block;
    position: absolute;
    width: 100%;
    height: 40px;
    left: 0;
    bottom: 0;
    background-color: white;
    border-radius: 100%;
    transform: translateY(50%);
  }

  // 登录按钮的样式
  .btn-login {
    width: 90%;
    border-radius: 100px;
    margin: 15px 0;
    background-color: #c00000;
  }
  // 按钮下方提示消息的样式
  .tips-text {
    font-size: 12px;
    color: gray;
  }
}
</style>
